Which term is the amount of water in the active layer of soil (top 1-2 m) and main source of water for agriculture and natural vegetation?

Which term is the amount of water in the active layer of soil (top 1-2 m) and main source of water for agriculture and natural vegetation?

• A. Inputs
• B. Groundwater
• C. Channel
• D. Soil Moisture

Answer: (D)

Soil moisture is the amount of water contained in the soil, especially in the active rooting zone near the surface (the top 1–2 meters). This is the water plants—both crops and natural vegetation—access directly for growth, making it the primary source they draw on between rains or irrigation. It fluctuates with rainfall, evaporation, and plant uptake, and is replenished when water enters the soil. Groundwater sits much deeper, in saturated layers below the root zone, and isn’t the immediate water source for most plants. A channel is a surface water body like a stream or river, which carries water above ground and isn’t the water held in the soil for plant use.

Soil moisture is the amount of water contained in the soil, especially in the active rooting zone near the surface (the top 1–2 meters). This is the water plants—both crops and natural vegetation—access directly for growth, making it the primary source they draw on between rains or irrigation. It fluctuates with rainfall, evaporation, and plant uptake, and is replenished when water enters the soil. Groundwater sits much deeper, in saturated layers below the root zone, and isn’t the immediate water source for most plants. A channel is a surface water body like a stream or river, which carries water above ground and isn’t the water held in the soil for plant use.